text: /*
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version 2
   * of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
   *
   * The Original Code is Copyright (C) 2004 by Blender Foundation.
   * All rights reserved.
   */
  
  /** \file
   * \ingroup edmesh
   */
  
  #include "BLI_math.h"
  #include "BLI_sys_types.h"
  
  #include "DNA_meshdata_types.h"
  #include "DNA_object_types.h"
  #include "DNA_scene_types.h"
  
  #include "BLT_translation.h"
  
  #include "BKE_context.h"
  #include "BKE_editmesh.h"
  
  #include "RNA_access.h"
  #include "RNA_define.h"
  
  #include "WM_api.h"
  #include "WM_types.h"
  
  #include "ED_mesh.h"
  #include "ED_object.h"
  #include "ED_screen.h"
  #include "ED_uvedit.h"
  
  #include "mesh_intern.h" /* own include */
  
  #define MESH_ADD_VERTS_MAXI 10000000
  
  /* ********* add primitive operators ************* */
  
  typedef struct MakePrimitiveData {
    float mat[4][4];
    bool was_editmode;
  } MakePrimitiveData;
  
  static Object *make_prim_init(bContext *C,
                                const char *idname,
                                const float loc[3],
                                const float rot[3],
                                const float scale[3],
                                ushort local_view_bits,
                                MakePrimitiveData *r_creation_data)
  {
    struct Main *bmain = CTX_data_main(C);
    Scene *scene = CTX_data_scene(C);
    Object *obedit = CTX_data_edit_object(C);
  
    r_creation_data->was_editmode = false;
    if (obedit == NULL || obedit->type != OB_MESH) {
      obedit = ED_object_add_type(C, OB_MESH, idname, loc, rot, false, local_view_bits);
      ED_object_editmode_enter_ex(bmain, scene, obedit, 0);
  
      r_creation_data->was_editmode = true;
    }
  
    ED_object_new_primitive_matrix(C, obedit, loc, rot, r_creation_data->mat);
  
    if (scale && !equals_v3v3(scale, (const float[3]){1.0f, 1.0f, 1.0f})) {
      float scale_half[3];
      copy_v3_v3(scale_half, scale);
      mul_v3_fl(scale_half, 0.5f);
      rescale_m4(r_creation_data->mat, scale_half);
    }
  
    return obedit;
  }
  
  static void make_prim_finish(bContext *C,
                               Object *obedit,
                               const MakePrimitiveData *creation_data,
                               int enter_editmode)
  {
    BMEditMesh *em = BKE_editmesh_from_object(obedit);
    const bool exit_editmode = ((creation_data->was_editmode == true) && (enter_editmode == false));
  
    /* Primitive has all verts selected, use vert select flush
     * to push this up to edges & faces. */
    EDBM_selectmode_flush_ex(em, SCE_SELECT_VERTEX);
  
    /* only recalc editmode tessface if we are staying in editmode */
    EDBM_update_generic(obedit->data, !exit_editmode, true);
  
    /* userdef */
    if (exit_editmode) {
      ED_object_editmode_exit_ex(CTX_data_main(C), CTX_data_scene(C), obedit, EM_FREEDATA);
    }
    WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, obedit);
  }
  
  static int add_primitive_plane_exec(bContext *C, wmOperator *op)
  {
    MakePrimitiveData creation_data;
    Object *obedit;
    BMEditMesh *em;
    float loc[3], rot[3];
    bool enter_editmode;
    ushort local_view_bits;
    const bool calc_uvs = RNA_boolean_get(op->ptr, "calc_uvs");
  
    WM_operator_view3d_unit_defaults(C, op);
    ED_object_add_generic_get_opts(
        C, op, 'Z', loc, rot, NULL, &enter_editmode, &local_view_bits, NULL);
    obedit = make_prim_init(C,
                            CTX_DATA_(BLT_I18NCONTEXT_ID_MESH, "Plane"),
                            loc,
                            rot,
                            NULL,
                            local_view_bits,
                            &creation_data);
  
    em = BKE_editmesh_from_object(obedit);
  
    if (calc_uvs) {
      ED_mesh_uv_texture_ensure(obedit->data, NULL);
    }
  
    if (!EDBM_op_call_and_selectf(
            em,
            op,
            "verts.out",
            false,
            "create_grid x_segments=%i y_segments=%i size=%f matrix=%m4 calc_uvs=%b",
            1,
            1,
            RNA_float_get(op->ptr, "size") / 2.0f,
            creation_data.mat,
            calc_uvs)) {
      return OPERATOR_CANCELLED;
    }
  
    make_prim_finish(C, obedit, &creation_data, enter_editmode);
  
    return OPERATOR_FINISHED;
  }
  
  void MESH_OT_primitive_plane_add(wmOperatorType *ot)
  {
    /* identifiers */
    ot->name = "Add Plane";
    ot->description = "Construct a filled planar mesh with 4 vertices";
    ot->idname = "MESH_OT_primitive_plane_add";
  
    /* api callbacks */
    ot->exec = add_primitive_plane_exec;
    ot->poll = ED_operator_scene_editable;
  
    /* flags */
    ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
  
    ED_object_add_unit_props_size(ot);
    ED_object_add_mesh_props(ot);
    ED_object_add_generic_props(ot, true);
  }
  
  static int add_primitive_cube_exec(bContext *C, wmOperator *op)
  {
    MakePrimitiveData creation_data;
    Object *obedit;
    BMEditMesh *em;
    float loc[3], rot[3], scale[3];
    bool enter_editmode;
    ushort local_view_bits;
    const bool calc_uvs = RNA_boolean_get(op->ptr, "calc_uvs");
  
    WM_operator_view3d_unit_defaults(C, op);
    ED_object_add_generic_get_opts(
        C, op, 'Z', loc, rot, scale, &enter_editmode, &local_view_bits, NULL);
    obedit = make_prim_init(C,
                            CTX_DATA_(BLT_I18NCONTEXT_ID_MESH, "Cube"),
                            loc,
                            rot,
                            scale,
                            local_view_bits,
                            &creation_data);
  
    em = BKE_editmesh_from_object(obedit);
  
    if (calc_uvs) {
      ED_mesh_uv_texture_ensure(obedit->data, NULL);
    }
  
    if (!EDBM_op_call_and_selectf(em,
                                  op,
                                  "verts.out",
                                  false,
                                  "create_cube matrix=%m4 size=%f calc_uvs=%b",
                                  creation_data.mat,
                                  RNA_float_get(op->ptr, "size"),
                                  calc_uvs)) {
      return OPERATOR_CANCELLED;
    }
  
    /* BMESH_TODO make plane side this: M_SQRT2 - plane (diameter of 1.41 makes it unit size) */
    make_prim_finish(C, obedit, &creation_data, enter_editmode);
  
    return OPERATOR_FINISHED;
  }
  
  void MESH_OT_primitive_cube_add(wmOperatorType *ot)
  {
    /* identifiers */
    ot->name = "Add Cube";
    ot->description = "Construct a cube mesh";
    ot->idname = "MESH_OT_primitive_cube_add";
  
    /* api callbacks */
    ot->exec = add_primitive_cube_exec;
    ot->poll = ED_operator_scene_editable;
  
    /* flags */
    ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
  
    ED_object_add_unit_props_size(ot);
    ED_object_add_mesh_props(ot);
    ED_object_add_generic_props(ot, true);
  }
  
  static const EnumPropertyItem fill_type_items[] = {
      {0, "NOTHING", 0, "Nothing", "Don't fill at all"},
      {1, "NGON", 0, "Ngon", "Use ngons"},
      {2, "TRIFAN", 0, "Triangle Fan", "Use triangle fans"},
      {0, NULL, 0, NULL, NULL},
  };
  
  static int add_primitive_circle_exec(bContext *C, wmOperator *op)
  {
    MakePrimitiveData creation_data;
    Object *obedit;
    BMEditMesh *em;
    float loc[3], rot[3];
    bool enter_editmode;
    ushort local_view_bits;
    int cap_end, cap_tri;
    const bool calc_uvs = RNA_boolean_get(op->ptr, "calc_uvs");
  
    cap_end = RNA_enum_get(op->ptr, "fill_type");
    cap_tri = (cap_end == 2);
  
    WM_operator_view3d_unit_defaults(C, op);
    ED_object_add_generic_get_opts(
        C, op, 'Z', loc, rot, NULL, &enter_editmode, &local_view_bits, NULL);
    obedit = make_prim_init(C,
                            CTX_DATA_(BLT_I18NCONTEXT_ID_MESH, "Circle"),
                            loc,
                            rot,
                            NULL,
                            local_view_bits,
                            &creation_data);
  
    em = BKE_editmesh_from_object(obedit);
  
    if (calc_uvs) {
      ED_mesh_uv_texture_ensure(obedit->data, NULL);
    }
  
    if (!EDBM_op_call_and_selectf(
            em,
            op,
            "verts.out",
            false,
            "create_circle segments=%i radius=%f cap_ends=%b cap_tris=%b matrix=%m4 calc_uvs=%b",
            RNA_int_get(op->ptr, "vertices"),
            RNA_float_get(op->ptr, "radius"),
            cap_end,
            cap_tri,
            creation_data.mat,
            calc_uvs)) {
      return OPERATOR_CANCELLED;
    }
  
    make_prim_finish(C, obedit, &creation_data, enter_editmode);
  
    return OPERATOR_FINISHED;
  }
  
  void MESH_OT_primitive_circle_add(wmOperatorType *ot)
  {
    /* identifiers */
    ot->name = "Add Circle";
    ot->description = "Construct a circle mesh";
    ot->idname = "MESH_OT_primitive_circle_add";
  
    /* api callbacks */
    ot->exec = add_primitive_circle_exec;
    ot->poll = ED_operator_scene_editable;
  
    /* flags */
    ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
  
    /* props */
    RNA_def_int(ot->srna, "vertices", 32, 3, MESH_ADD_VERTS_MAXI, "Vertices", "", 3, 500);
    ED_object_add_unit_props_radius(ot);
    RNA_def_enum(ot->srna, "fill_type", fill_type_items, 0, "Fill Type", "");
  
    ED_object_add_mesh_props(ot);
    ED_object_add_generic_props(ot, true);
  }
  
  static int add_primitive_cylinder_exec(bContext *C, wmOperator *op)
  {
    MakePrimitiveData creation_data;
    Object *obedit;
    BMEditMesh *em;
    float loc[3], rot[3], scale[3];
    bool enter_editmode;
    ushort local_view_bits;
    const int end_fill_type = RNA_enum_get(op->ptr, "end_fill_type");
    const bool cap_end = (end_fill_type != 0);
    const bool cap_tri = (end_fill_type == 2);
    const bool calc_uvs = RNA_boolean_get(op->ptr, "calc_uvs");
  
    WM_operator_view3d_unit_defaults(C, op);
    ED_object_add_generic_get_opts(
        C, op, 'Z', loc, rot, scale, &enter_editmode, &local_view_bits, NULL);
    obedit = make_prim_init(C,
                            CTX_DATA_(BLT_I18NCONTEXT_ID_MESH, "Cylinder"),
                            loc,
                            rot,
                            scale,
                            local_view_bits,
                            &creation_data);
    em = BKE_editmesh_from_object(obedit);
  
    if (calc_uvs) {
      ED_mesh_uv_texture_ensure(obedit->data, NULL);
    }
  
    if (!EDBM_op_call_and_selectf(em,
                                  op,
                                  "verts.out",
                                  false,
                                  "create_cone segments=%i diameter1=%f diameter2=%f cap_ends=%b "
                                  "cap_tris=%b depth=%f matrix=%m4 calc_uvs=%b",
                                  RNA_int_get(op->ptr, "vertices"),
                                  RNA_float_get(op->ptr, "radius"),
                                  RNA_float_get(op->ptr, "radius"),
                                  cap_end,
                                  cap_tri,
                                  RNA_float_get(op->ptr, "depth"),
                                  creation_data.mat,
                                  calc_uvs)) {
      return OPERATOR_CANCELLED;
    }
  
    make_prim_finish(C, obedit, &creation_data, enter_editmode);
  
    return OPERATOR_FINISHED;
  }
  
  void MESH_OT_primitive_cylinder_add(wmOperatorType *ot)
  {
    /* identifiers */
    ot->name = "Add Cylinder";
    ot->description = "Construct a cylinder mesh";
    ot->idname = "MESH_OT_primitive_cylinder_add";
  
    /* api callbacks */
    ot->exec = add_primitive_cylinder_exec;
    ot->poll = ED_operator_scene_editable;
  
    /* flags */
    ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
  
    /* props */
    RNA_def_int(ot->srna, "vertices", 32, 3, MESH_ADD_VERTS_MAXI, "Vertices", "", 3, 500);
    ED_object_add_unit_props_radius(ot);
    RNA_def_float_distance(
        ot->srna, "depth", 2.0f, 0.0, OBJECT_ADD_SIZE_MAXF, "Depth", "", 0.001, 100.00);
    RNA_def_enum(ot->srna, "end_fill_type", fill_type_items, 1, "Cap Fill Type", "");
  
    ED_object_add_mesh_props(ot);
    ED_object_add_generic_props(ot, true);
  }
  
  static int add_primitive_cone_exec(bContext *C, wmOperator *op)
  {
    MakePrimitiveData creation_data;
    Object *obedit;
    BMEditMesh *em;
    float loc[3], rot[3], scale[3];
    bool enter_editmode;
    ushort local_view_bits;
    const int end_fill_type = RNA_enum_get(op->ptr, "end_fill_type");
    const bool cap_end = (end_fill_type != 0);
    const bool cap_tri = (end_fill_type == 2);
    const bool calc_uvs = RNA_boolean_get(op->ptr, "calc_uvs");
  
    WM_operator_view3d_unit_defaults(C, op);
    ED_object_add_generic_get_opts(
        C, op, 'Z', loc, rot, scale, &enter_editmode, &local_view_bits, NULL);
    obedit = make_prim_init(C,
                            CTX_DATA_(BLT_I18NCONTEXT_ID_MESH, "Cone"),
                            loc,
                            rot,
                            scale,
                            local_view_bits,
                            &creation_data);
    em = BKE_editmesh_from_object(obedit);
  
    if (calc_uvs) {
      ED_mesh_uv_texture_ensure(obedit->data, NULL);
    }
  
    if (!EDBM_op_call_and_selectf(em,
                                  op,
                                  "verts.out",
                                  false,
                                  "create_cone segments=%i diameter1=%f diameter2=%f cap_ends=%b "
                                  "cap_tris=%b depth=%f matrix=%m4 calc_uvs=%b",
                                  RNA_int_get(op->ptr, "vertices"),
                                  RNA_float_get(op->ptr, "radius1"),
                                  RNA_float_get(op->ptr, "radius2"),
                                  cap_end,
                                  cap_tri,
                                  RNA_float_get(op->ptr, "depth"),
                                  creation_data.mat,
                                  calc_uvs)) {
      return OPERATOR_CANCELLED;
    }
  
    make_prim_finish(C, obedit, &creation_data, enter_editmode);
  
    return OPERATOR_FINISHED;
  }
  
  void MESH_OT_primitive_cone_add(wmOperatorType *ot)
  {
    /* identifiers */
    ot->name = "Add Cone";
    ot->description = "Construct a conic mesh";
    ot->idname = "MESH_OT_primitive_cone_add";
  
    /* api callbacks */
    ot->exec = add_primitive_cone_exec;
    ot->poll = ED_operator_scene_editable;
  
    /* flags */
    ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
  
    /* props */
    RNA_def_int(ot->srna, "vertices", 32, 3, MESH_ADD_VERTS_MAXI, "Vertices", "", 3, 500);
    RNA_def_float_distance(
        ot->srna, "radius1", 1.0f, 0.0, OBJECT_ADD_SIZE_MAXF, "Radius 1", "", 0.001, 100.00);
    RNA_def_float_distance(
        ot->srna, "radius2", 0.0f, 0.0, OBJECT_ADD_SIZE_MAXF, "Radius 2", "", 0.0, 100.00);
    RNA_def_float_distance(
        ot->srna, "depth", 2.0f, 0.0, OBJECT_ADD_SIZE_MAXF, "Depth", "", 0.001, 100.00);
    RNA_def_enum(ot->srna, "end_fill_type", fill_type_items, 1, "Base Fill Type", "");
  
    ED_object_add_mesh_props(ot);
    ED_object_add_generic_props(ot, true);
  }
  
  static int add_primitive_grid_exec(bContext *C, wmOperator *op)
  {
    MakePrimitiveData creation_data;
    Object *obedit;
    BMEditMesh *em;
    float loc[3], rot[3];
    bool enter_editmode;
    ushort local_view_bits;
    const bool calc_uvs = RNA_boolean_get(op->ptr, "calc_uvs");
  
    WM_operator_view3d_unit_defaults(C, op);
    ED_object_add_generic_get_opts(
        C, op, 'Z', loc, rot, NULL, &enter_editmode, &local_view_bits, NULL);
    obedit = make_prim_init(C,
                            CTX_DATA_(BLT_I18NCONTEXT_ID_MESH, "Grid"),
                            loc,
                            rot,
                            NULL,
                            local_view_bits,
                            &creation_data);
    em = BKE_editmesh_from_object(obedit);
  
    if (calc_uvs) {
      ED_mesh_uv_texture_ensure(obedit->data, NULL);
    }
  
    if (!EDBM_op_call_and_selectf(
            em,
            op,
            "verts.out",
            false,
            "create_grid x_segments=%i y_segments=%i size=%f matrix=%m4 calc_uvs=%b",
            RNA_int_get(op->ptr, "x_subdivisions"),
            RNA_int_get(op->ptr, "y_subdivisions"),
            RNA_float_get(op->ptr, "size") / 2.0f,
            creation_data.mat,
            calc_uvs)) {
      return OPERATOR_CANCELLED;
    }
  
    make_prim_finish(C, obedit, &creation_data, enter_editmode);
  
    return OPERATOR_FINISHED;
  }
  
  void MESH_OT_primitive_grid_add(wmOperatorType *ot)
  {
    /* identifiers */
    ot->name = "Add Grid";
    ot->description = "Construct a grid mesh";
    ot->idname = "MESH_OT_primitive_grid_add";
  
    /* api callbacks */
    ot->exec = add_primitive_grid_exec;
    ot->poll = ED_operator_scene_editable;
  
    /* flags */
    ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
  
    /* props */
    /* Note that if you use MESH_ADD_VERTS_MAXI for both x and y at the same time
     * you will still reach impossible values (10^12 vertices or so...). */
    RNA_def_int(
        ot->srna, "x_subdivisions", 10, 2, MESH_ADD_VERTS_MAXI, "X Subdivisions", "", 2, 1000);
    RNA_def_int(
        ot->srna, "y_subdivisions", 10, 2, MESH_ADD_VERTS_MAXI, "Y Subdivisions", "", 2, 1000);
  
    ED_object_add_unit_props_size(ot);
    ED_object_add_mesh_props(ot);
    ED_object_add_generic_props(ot, true);
  }
  
  static int add_primitive_monkey_exec(bContext *C, wmOperator *op)
  {
    MakePrimitiveData creation_data;
    Object *obedit;
    BMEditMesh *em;
    float loc[3], rot[3];
    float dia;
    bool enter_editmode;
    ushort local_view_bits;
    const bool calc_uvs = RNA_boolean_get(op->ptr, "calc_uvs");
  
    WM_operator_view3d_unit_defaults(C, op);
    ED_object_add_generic_get_opts(
        C, op, 'Y', loc, rot, NULL, &enter_editmode, &local_view_bits, NULL);
  
    obedit = make_prim_init(C,
                            CTX_DATA_(BLT_I18NCONTEXT_ID_MESH, "Suzanne"),
                            loc,
                            rot,
                            NULL,
                            local_view_bits,
                            &creation_data);
    dia = RNA_float_get(op->ptr, "size") / 2.0f;
    mul_mat3_m4_fl(creation_data.mat, dia);
  
    em = BKE_editmesh_from_object(obedit);
  
    if (calc_uvs) {
      ED_mesh_uv_texture_ensure(obedit->data, NULL);
    }
  
    if (!EDBM_op_call_and_selectf(em,
                                  op,
                                  "verts.out",
                                  false,
                                  "create_monkey matrix=%m4 calc_uvs=%b",
                                  creation_data.mat,
                                  calc_uvs)) {
      return OPERATOR_CANCELLED;
    }
  
    make_prim_finish(C, obedit, &creation_data, enter_editmode);
  
    return OPERATOR_FINISHED;
  }
  
  void MESH_OT_primitive_monkey_add(wmOperatorType *ot)
  {
    /* identifiers */
    ot->name = "Add Monkey";
    ot->description = "Construct a Suzanne mesh";
    ot->idname = "MESH_OT_primitive_monkey_add";
  
    /* api callbacks */
    ot->exec = add_primitive_monkey_exec;
    ot->poll = ED_operator_scene_editable;
  
    /* flags */
    ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
  
    /* props */
    ED_object_add_unit_props_size(ot);
    ED_object_add_mesh_props(ot);
    ED_object_add_generic_props(ot, true);
  }
  
  static int add_primitive_uvsphere_exec(bContext *C, wmOperator *op)
  {
    MakePrimitiveData creation_data;
    Object *obedit;
    BMEditMesh *em;
    float loc[3], rot[3], scale[3];
    bool enter_editmode;
    ushort local_view_bits;
    const bool calc_uvs = RNA_boolean_get(op->ptr, "calc_uvs");
  
    WM_operator_view3d_unit_defaults(C, op);
    ED_object_add_generic_get_opts(
        C, op, 'Z', loc, rot, scale, &enter_editmode, &local_view_bits, NULL);
    obedit = make_prim_init(C,
                            CTX_DATA_(BLT_I18NCONTEXT_ID_MESH, "Sphere"),
                            loc,
                            rot,
                            scale,
                            local_view_bits,
                            &creation_data);
    em = BKE_editmesh_from_object(obedit);
  
    if (calc_uvs) {
      ED_mesh_uv_texture_ensure(obedit->data, NULL);
    }
  
    if (!EDBM_op_call_and_selectf(
            em,
            op,
            "verts.out",
            false,
            "create_uvsphere u_segments=%i v_segments=%i diameter=%f matrix=%m4 calc_uvs=%b",
            RNA_int_get(op->ptr, "segments"),
            RNA_int_get(op->ptr, "ring_count"),
            RNA_float_get(op->ptr, "radius"),
            creation_data.mat,
            calc_uvs)) {
      return OPERATOR_CANCELLED;
    }
  
    make_prim_finish(C, obedit, &creation_data, enter_editmode);
  
    return OPERATOR_FINISHED;
  }
  
  void MESH_OT_primitive_uv_sphere_add(wmOperatorType *ot)
  {
    /* identifiers */
    ot->name = "Add UV Sphere";
    ot->description = "Construct a UV sphere mesh";
    ot->idname = "MESH_OT_primitive_uv_sphere_add";
  
    /* api callbacks */
    ot->exec = add_primitive_uvsphere_exec;
    ot->poll = ED_operator_scene_editable;
  
    /* flags */
    ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
  
    /* props */
    RNA_def_int(ot->srna, "segments", 32, 3, MESH_ADD_VERTS_MAXI / 100, "Segments", "", 3, 500);
    RNA_def_int(ot->srna, "ring_count", 16, 3, MESH_ADD_VERTS_MAXI / 100, "Rings", "", 3, 500);
  
    ED_object_add_unit_props_radius(ot);
    ED_object_add_mesh_props(ot);
    ED_object_add_generic_props(ot, true);
  }
  
  static int add_primitive_icosphere_exec(bContext *C, wmOperator *op)
  {
    MakePrimitiveData creation_data;
    Object *obedit;
    BMEditMesh *em;
    float loc[3], rot[3], scale[3];
    bool enter_editmode;
    ushort local_view_bits;
    const bool calc_uvs = RNA_boolean_get(op->ptr, "calc_uvs");
  
    WM_operator_view3d_unit_defaults(C, op);
    ED_object_add_generic_get_opts(
        C, op, 'Z', loc, rot, scale, &enter_editmode, &local_view_bits, NULL);
    obedit = make_prim_init(C,
                            CTX_DATA_(BLT_I18NCONTEXT_ID_MESH, "Icosphere"),
                            loc,
                            rot,
                            scale,
                            local_view_bits,
                            &creation_data);
    em = BKE_editmesh_from_object(obedit);
  
    if (calc_uvs) {
      ED_mesh_uv_texture_ensure(obedit->data, NULL);
    }
  
    if (!EDBM_op_call_and_selectf(
            em,
            op,
            "verts.out",
            false,
            "create_icosphere subdivisions=%i diameter=%f matrix=%m4 calc_uvs=%b",
            RNA_int_get(op->ptr, "subdivisions"),
            RNA_float_get(op->ptr, "radius"),
            creation_data.mat,
            calc_uvs)) {
      return OPERATOR_CANCELLED;
    }
  
    make_prim_finish(C, obedit, &creation_data, enter_editmode);
  
    return OPERATOR_FINISHED;
  }
  
  void MESH_OT_primitive_ico_sphere_add(wmOperatorType *ot)
  {
    /* identifiers */
    ot->name = "Add Ico Sphere";
    ot->description = "Construct an Icosphere mesh";
    ot->idname = "MESH_OT_primitive_ico_sphere_add";
  
    /* api callbacks */
    ot->exec = add_primitive_icosphere_exec;
    ot->poll = ED_operator_scene_editable;
  
    /* flags */
    ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
  
    /* props */
    RNA_def_int(ot->srna, "subdivisions", 2, 1, 10, "Subdivisions", "", 1, 8);
  
    ED_object_add_unit_props_radius(ot);
    ED_object_add_mesh_props(ot);
    ED_object_add_generic_props(ot, true);
  }
  